US20040041329A1 - Sheet feeder - Google Patents
Sheet feeder Download PDFInfo
- Publication number
- US20040041329A1 US20040041329A1 US10/649,866 US64986603A US2004041329A1 US 20040041329 A1 US20040041329 A1 US 20040041329A1 US 64986603 A US64986603 A US 64986603A US 2004041329 A1 US2004041329 A1 US 2004041329A1
- Authority
- US
- United States
- Prior art keywords
- sensor lever
- sheet
- sheets
- axis
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/04—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to absence of articles, e.g. exhaustion of pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/21—Angle
- B65H2511/212—Rotary position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/30—Numbers, e.g. of windings or rotations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/60—Details of intermediate means between the sensing means and the element to be sensed
- B65H2553/61—Mechanical means, e.g. contact arms
Definitions
- the present invention relates to a sheet feeder for holding a plurality of paper sheets and feeding individual sheets one by one to an image reading device, printer or the like. Specifically, it relates to a sheet feeder provided with a sheet sensor for detecting the absence/existence of a sheet and the width of a sheet by sensing a change of a swing angle of a sensor lever.
- a method using a rotary (swinging) lever for discriminating the size of a paper sheet and the existence/absence of a paper sheet is also known.
- this conventional method has been implemented in such a manner that the swinging lever can take refuge in an opening made on a sheet supporting table to widen the swinging range of the swinging lever in order to increase the detection ability of the swinging lever.
- An object of the present invention is to provide a sheet feeder capable of causing a conventional sensor lever to swing in accordance with an amount of sheets loaded in a sheet cassette and detecting the amount of the sheets based on a change in a swing angle of the sensor lever, wherein a bottom board for supporting a pile of sheets has a notch for receiving the sensor lever so that the sensor lever can surely detect the existence/absence of the paper by increasing a changing amount of the swing angle of the sensor lever before and after the last sheet is fed.
- the sheet feeder according to the present invention can load an increased amount of sheets by enabling the sensor lever to swing for loading a larger number of sheets in the sheet cassette and, when an amount of sheets increases, retracting the sensor lever from the pile of sheets. On the contrary, with a small amount of remaining sheets, the sensor lever is prevented from retracting never to fail in detecting the state of no remaining sheet in the sheet cassette.
- Another object of the present invention is to provide a sheet feeder separating a sheet from a pile of sheets loaded in a sheet cassette and feeding it to a next process, wherein a sensor lever abuts against a top of a pile of sheets in the sheet cassette and swings with a swinging axis and changes its angle in accordance with an amount of sheets loaded in the sheet cassette, and when a large number of sheets are loaded in the sheet cassette the swinging axis can move upward together with the sensor lever in the direction of separating the sensor lever from the pile of sheets.
- Another object of the present invention is to provide a sheet feeder as described above, wherein a sensor lever is supported at its swinging axis in an elliptic hole made in a supporting member and has an abutting member which may abut against the receiving portion of the supporting member to prevent the swinging axis of the sensor lever from moving with a small amount or no amount of sheets.
- This simple means enables the sheet feeder to surely prevent the movement of the swinging axis of the sensor lever, ensuring the reliable operation of the sensor lever with a small amount of remaining sheets to be fed.
- a further object of the present invention is to provide a sheet feeder as described above, wherein a sensor lever is supported at its swinging axis with a noncircular cross-section inserted in an elliptic hole with an enlarged round portion made in the supporting member to prevent the movement of the swinging axis in the elliptic hole of the supporting member with a small amount or no amount of sheets, thereby ensuring the reliable operation of the sensor lever with a small amount of remaining sheets in the cassettes.
- a still further object of the present invention is to provide a sheet feeder as described above, wherein a lower tip of the sensor lever can fall into a concave formed in a sheet piling portion to increase the rotation angle of the sensor lever before and after the last sheet is fed, thereby ensuring the reliable detection of the existence/absence of the sheets.
- FIG. 1 is a schematic sectional view of a laser facsimile apparatus using a sheet feeder according to the present invention.
- FIG. 2 is a perspective view of a sheet cassette used in the laser facsimile apparatus.
- FIGS. 3A, 3B and 3 C are sectional side views for explaining the operation of the sheet cassette.
- FIG. 4 is a side view of the first example of a sheet sensor used in a sheet feeder according to the present invention.
- FIG. 5 is a side view of the second example of a sheet sensor used in a sheet feeder according to the present invention.
- a sheet feeder according to the present invention is to separate a sheet from a sheet pile and feed it to a next processing portion and is applied for an image reading device in which document sheets piled are picked up one by one, scanned by a document reading device and then delivered out, or an image forming device, for example, a printer wherein cut-sheets are picked up one by one, printed by a printing portion and then delivered out.
- an image reading device in which document sheets piled are picked up one by one, scanned by a document reading device and then delivered out
- an image forming device for example, a printer wherein cut-sheets are picked up one by one, printed by a printing portion and then delivered out.
- FIG. 1 schematically illustrates in cross section a laser facsimile apparatus using a sheet feeder according to the present invention, where electronic circuits etc. which do not directly relate to the present invention are omitted for simplicity.
- a control portion 1 is a man-machine interface portion having various kinds of key buttons for inputting information by a user and a display for presenting information to a user.
- a plurality of documents to be read are loaded on a document feeding portion 2 and separated one by one by a separating rubber plate 4 disposed opposite to a separator roller 3 and fed to a document reading unit 5 by which it is read and then delivered by a document delivering rollers 6 to a document discharging portion 7 where a document stacker (not shown in FIG. 1) is provided for receiving documents delivered.
- a pile of sheets (recording paper) S are loaded in a sheet cassette 11 wherefrom one sheet is separated and fed by a pickup roller 12 (to be described later) to an image transferring portion 19 where toner from a light-sensitive drum 14 is transferred on the sheet S and forms a visible image on the sheet S.
- the sheet carrying a toner-developed image is then heated by a fixing roller 21 for fusing and fixing toner which forms the image on the sheet S.
- the sheet S is transported along a document transporting route 20 through the fixing roller 21 to a delivery stacker 22 .
- some of the sheet guides disposed along the document transporting route 20 for transporting a sheet S are not shown in FIG. 1.
- Printing the sheet S is carried out as follows:
- Laser beam L from a laser unit 16 transfers image on the light-sensitive drum 14 previously electrically charged by a charging portion 15 .
- Laser beam L is modulated with information to be printed and converted by a polygon mirror (not shown) to a scanning beam which beam is then reflected from a reflecting mirror 17 and scan the electrically charged surface of the light-sensitive drum 14 to form a latent electrostatic image thereon to be transferred later on a recording paper sheet.
- the scanning laser beam L carries thereon an on-off imaging pattern necessary for forming an image to be printed and the drum electrically charged in advance by the charging portion 15 is scanned by the laser beam L becomes to have decreased potentials of exposed parts on its surface in accordance with the scanning pattern, resulting in forming a latent electrostatic image to be printed on the light-sensitive drum 14 .
- the latent electrostatic image formed on the light-sensitive drum 14 is developed with toner picked up from a developing bath 18 to present a visible image which is then transferred onto a sheet S by an image transfer portion 19 .
- a sensor lever according to the present invention is applied as a sheet sensor for a pile of sheets S loaded in a sheet cassette 11 of the shown laser facsimile apparatus.
- FIG. 2 is a perspective view of a sheet cassette used in a laser facsimile apparatus. Sheets are piled on a bottom board 23 of the sheet cassette 11 , which board is supported at one end by a supporting shaft 25 and can be lifted by a force of a spring 26 (see FIGS. 3A, 3B and 3 C). The front edge of the top of the sheet pile is prevented from being lifted by a pair of sheet limiting fingers 27 . Namely, the top of the sheet pile is always pressed by the sheet limiting fingers 27 .
- a (front) lower tip 34 a of a sensor lever 34 falls into a concave (i.e., “sensor lever receiving port”) 24 formed on the bottom board 23 with a large change in swing angle, which is detected to indicate the absence of the sheet S in the sheet cassette 11 .
- the provision of the sensor lever receiving port 24 can produce a greater change in swing angle of the sensor lever 34 before and after the last sheet S disappears from the sheet cassette 11 , thereby making it possible to surely detect the state of no paper existing in the sheet cassette 11 .
- a change in a swing angle of the sensor lever 34 can be detected by using a suitable sensor element such as a micro-switch, reed switch, electromagnetic sensor, photo coupler and so on.
- a suitable sensor element such as a micro-switch, reed switch, electromagnetic sensor, photo coupler and so on.
- a linear arrangement of plural micro-switches for detecting an angle of the sensor lever 34 is effective to indicate an approximate amount of recording sheets remaining in the sheet cassette 11 .
- FIGS. 3A, 3B and 3 C are sectional side elevations for explaining the operation of the sheet cassette.
- FIG. 3A shows the sheet cassette loaded with a sufficient amount of sheets
- FIG. 3B shows the sheet cassette with a small amount of sheets therein
- FIG. 3C shows the sheet cassette with no paper therein.
- the sheet cassette 11 is full loaded with paper sheets S on the top of which a sensor lever 34 lies taking an approximate horizontal angular position.
- a whole sensor lever 34 with its swinging axis (sensor lever axis) 35 is lifted upward by the effect of technical means (to be described later) to increase the number of sheets to be loaded in the sheet cassette 11 .
- FIG. 3B illustrates the state of the sheet cassette 11 containing a small amount of paper sheets S in which the bottom board 23 supported by the supporting shaft 25 is tilted with its front end lifted on the side of the pickup roller 12 .
- the top of paper sheets abuts against the sheet limiting fingers 27 and the function of separating a top sheet and feeding it by the pickup roller 12 still remains in ready to operate.
- the lower tip 34 a of the sensor lever 34 moved downward from the position shown in FIG. 3A. However, a detection signal “no paper” cannot be generated in this state of the sensor lever 34 .
- FIG. 4 illustrates a side view of the first example of a sheet sensor used in the sheet feeder according to the present invention.
- a sensor lever 34 has a sensor lever axis (swinging axis) 35 fitted in an elliptic hole 32 made in a sensor lever holding member 31 for the sensor lever and can freely swing.
- a sensor lever holding member 31 corresponds to a supporting member defined in claims.
- the sensor lever 34 locates at the lowest part of the elliptic hole 32 by its weight.
- the sensor lever 34 has a sensor lever abutting member 36 and the sensor lever holding member 31 has a sensor lever receiving member 33 . With a small amount of sheets in the cassette as shown FIG.
- the sensor lever 34 swings and the sensor lever abutting member 36 abuts against the sensor lever receiving member 33 of the sensor lever holding member 31 .
- the sensor lever axis 35 cannot move upward in the elliptic hole 32 .
- the sensor lever axis 35 is prevented from moving upward in the elliptic hole 32 by abutting the sensor lever abutting member 36 against the sensor lever receiving member 33 .
- a change in angular position of the sensor lever 34 is correctly detected to indicate the existence/absence of a paper sheet in the cassette.
- FIG. 5 illustrates a side view of the second example of a sheet sensor usable in a sheet feeder according to the present invention.
- the sensor lever 43 has a sensor lever axis 44 movably fitted in an elliptic hole 42 made in a sensor lever holding member 41 for the sensor lever.
- the sensor lever axis 44 has a noncircular section of different sizes in radial directions. In the shown instance, the sensor lever axis 44 with an elliptic cross-section can or cannot move in the elliptic hole in the holding member depending on an angle of the sensor lever 43 .
- the elliptic hole 42 made in the holding member 41 has a larger diameter round hole 42 a in its lower end of the elliptic hole 42 . Therefore, the sensor lever axis 44 can freely rotate in the larger round hole 42 a at any angle of the sensor lever 43 .
- the sensor lever axis 44 can move upward in the upper portion of the elliptic hole 42 since the direction of the longest diameter of the sensor lever axis 44 is identical to the longitudinal direction of the elliptic hole 42 of the sensor lever holding member 41 .
- This sheet sensor can retract the sensor lever 43 upward by moving the sensor lever axis upward in the elliptic hole 42 when the sheet cassette is loaded with a large number of paper sheets.
- the sheet sensor keeps the sensor lever axis 44 in the large round hole 42 a when the sensor lever 43 works with a reduced amount of sheets in the sheet cassette, reliably sensing the existence/absence of paper sheets to be fed.
- the sheet feeder can be also applied to any of other devices requiring feeding paper sheets from a pile of sheets and, therefore, the scope of the claims is not limited to the described applications and embodiments.
- a sheet feeder according to the present invention is a compact structure and capable of accommodating a large number of paper sheets in the sheet cassette by swinging the sensor lever and retracting the sensor lever upward with its swinging axis moved in the direction parting from the top of sheets when a large amount of sheets are loaded in the sheet cassette, and making the movement of sensor lever reliable which detects the existence/absence of a paper sheet by the sensor lever.
- the abutting member is formed on the sensor lever and abuts against a receiving member of the supporting member, thereby preventing the movement of the swinging axis in a simple structure and enabling the movement of the sensor lever to be reliable.
- the sensor lever has a swinging axis of a noncircular profile, which axis is fitted in an elliptic hole with an enlarged round hole formed in the supporting member. With a small amount or no amount of paper sheets remaining in the sheet cassette, the swinging axis is kept in the enlarged round hole in order to ensure the reliable action of the sensor lever with decreasing amount of the remaining sheets.
Landscapes
- Controlling Sheets Or Webs (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002248565A JP4104399B2 (ja) | 2002-08-28 | 2002-08-28 | 給紙装置 |
JP2002-248565 | 2002-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040041329A1 true US20040041329A1 (en) | 2004-03-04 |
Family
ID=31972526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/649,866 Abandoned US20040041329A1 (en) | 2002-08-28 | 2003-08-28 | Sheet feeder |
Country Status (2)
Country | Link |
---|---|
US (1) | US20040041329A1 (ja) |
JP (1) | JP4104399B2 (ja) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040195757A1 (en) * | 2002-12-09 | 2004-10-07 | Samsung Electronics Co., Ltd | Pickup error-sensing apparatus of image forming apparatus and method therefor |
US20070020015A1 (en) * | 2005-07-11 | 2007-01-25 | Brother Kogyo Kabushiki Kaisha | Sheet transporting device and image forming apparatus using the same |
US7198265B2 (en) * | 2004-08-31 | 2007-04-03 | Lexmark International, Inc. | Imaging apparatus including a movable media sensor |
US20070170640A1 (en) * | 2006-01-26 | 2007-07-26 | Canon Kabushiki Kaisha | Image forming apparatus |
US20080006986A1 (en) * | 2006-07-10 | 2008-01-10 | Silverbrook Research Pty Ltd | Sheet feed mechanism |
WO2008033092A1 (en) * | 2006-09-14 | 2008-03-20 | Bindomatic Ab | A binding machine a cassette machine and a booklet binding method |
US20080219732A1 (en) * | 2006-08-29 | 2008-09-11 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
US20090057989A1 (en) * | 2007-08-31 | 2009-03-05 | Kyocera Mita Corporation | Paper Feeder |
US20150183596A1 (en) * | 2013-12-27 | 2015-07-02 | Kyocera Document Solutions Inc. | Paper feeding apparatus detecting recording paper presence/absence, paper feed cassette attaching/detaching, and lift plate reaching rising stop position, and image forming apparatus equipped with the same |
US20160167901A1 (en) * | 2014-12-10 | 2016-06-16 | Kyocera Document Solutions Inc. | Sheet feeding cassette and image forming apparatus including the same |
US10486928B2 (en) * | 2014-11-19 | 2019-11-26 | Canon Kabushiki Kaisha | Sheet detecting device, sheet feeding unit including the same and image forming apparatus |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5083765B2 (ja) * | 2007-12-28 | 2012-11-28 | ニスカ株式会社 | シート給紙装置 |
JP7161345B2 (ja) * | 2018-08-29 | 2022-10-26 | シャープ株式会社 | 給紙装置および画像形成装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2032166A (en) * | 1932-12-29 | 1936-02-25 | Breuer Armin | Paper conveying device for sheets, especially for use in office printing machines |
US3827687A (en) * | 1971-04-21 | 1974-08-06 | Minolta Camera Kk | Device for supporting sensitive paper cassette for electrophotography copier |
US4853740A (en) * | 1986-01-10 | 1989-08-01 | Canon Kabushiki Kaisha | Recording apparatus capable of multiple recording on one or both sides of a sheet |
US5398924A (en) * | 1993-04-14 | 1995-03-21 | Heidelberger Druckmaschinen Ag | Sensor for cyclically scanning the height of a pile |
US5447301A (en) * | 1993-04-14 | 1995-09-05 | Heidelberger Druckmaschinen Ag | Governor foot assembly for cyclically sensing the height of a feeder sheet pile |
US6263258B1 (en) * | 1998-08-03 | 2001-07-17 | Stanley P. Dabrowski | Scrip dispenser |
-
2002
- 2002-08-28 JP JP2002248565A patent/JP4104399B2/ja not_active Expired - Fee Related
-
2003
- 2003-08-28 US US10/649,866 patent/US20040041329A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2032166A (en) * | 1932-12-29 | 1936-02-25 | Breuer Armin | Paper conveying device for sheets, especially for use in office printing machines |
US3827687A (en) * | 1971-04-21 | 1974-08-06 | Minolta Camera Kk | Device for supporting sensitive paper cassette for electrophotography copier |
US4853740A (en) * | 1986-01-10 | 1989-08-01 | Canon Kabushiki Kaisha | Recording apparatus capable of multiple recording on one or both sides of a sheet |
US5398924A (en) * | 1993-04-14 | 1995-03-21 | Heidelberger Druckmaschinen Ag | Sensor for cyclically scanning the height of a pile |
US5447301A (en) * | 1993-04-14 | 1995-09-05 | Heidelberger Druckmaschinen Ag | Governor foot assembly for cyclically sensing the height of a feeder sheet pile |
US6263258B1 (en) * | 1998-08-03 | 2001-07-17 | Stanley P. Dabrowski | Scrip dispenser |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7063315B2 (en) * | 2002-12-09 | 2006-06-20 | Samsung Electronics Co., Ltd. | Pickup error-sensing apparatus of image forming apparatus and method therefor |
US20060208418A1 (en) * | 2002-12-09 | 2006-09-21 | Samsung Electronics Co., Ltd. | Pickup error-sensing apparatus of image forming apparatus and method therefor |
US20060208415A1 (en) * | 2002-12-09 | 2006-09-21 | Samsung Electronics Co., Ltd. | Pickup error-sensing apparatus of image forming apparatus and method therefor |
US20040195757A1 (en) * | 2002-12-09 | 2004-10-07 | Samsung Electronics Co., Ltd | Pickup error-sensing apparatus of image forming apparatus and method therefor |
US7198265B2 (en) * | 2004-08-31 | 2007-04-03 | Lexmark International, Inc. | Imaging apparatus including a movable media sensor |
US20070020015A1 (en) * | 2005-07-11 | 2007-01-25 | Brother Kogyo Kabushiki Kaisha | Sheet transporting device and image forming apparatus using the same |
US7597313B2 (en) * | 2005-07-11 | 2009-10-06 | Brother Kogyo Kabushiki Kaisha | Sheet transporting device and image forming apparatus using the same |
US7540492B2 (en) * | 2006-01-26 | 2009-06-02 | Canon Kabushiki Kaisha | Image forming apparatus |
US20070170640A1 (en) * | 2006-01-26 | 2007-07-26 | Canon Kabushiki Kaisha | Image forming apparatus |
US20080006986A1 (en) * | 2006-07-10 | 2008-01-10 | Silverbrook Research Pty Ltd | Sheet feed mechanism |
US7726647B2 (en) | 2006-07-10 | 2010-06-01 | Silverbrook Research Pty Ltd | Sheet feed mechanism |
US8118300B2 (en) | 2006-07-10 | 2012-02-21 | Silverbrook Research Pty Ltd | Sheet feed mechanism |
US20100225049A1 (en) * | 2006-07-10 | 2010-09-09 | Silverbrook Research Pty Ltd | Sheet feed mechanism |
US7571906B2 (en) | 2006-07-10 | 2009-08-11 | Silverbrook Research Pty Ltd | Sheet feed mechanism |
WO2008006138A1 (en) * | 2006-07-10 | 2008-01-17 | Silverbrook Research Pty Ltd | Sheet feed mechanism |
US20090278300A1 (en) * | 2006-07-10 | 2009-11-12 | Silverbrook Research Pty Ltd | Sheet Feed Mechanism |
US7644921B2 (en) | 2006-08-29 | 2010-01-12 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
US20080219732A1 (en) * | 2006-08-29 | 2008-09-11 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
US20100021269A1 (en) * | 2006-09-14 | 2010-01-28 | Urpo Latvakangas | Binding machine a cassette machine and booklet binding method |
WO2008033092A1 (en) * | 2006-09-14 | 2008-03-20 | Bindomatic Ab | A binding machine a cassette machine and a booklet binding method |
US8210513B2 (en) | 2006-09-14 | 2012-07-03 | Bindomatic Ab | Binding machine a cassette machine and booklet binding method |
US7823874B2 (en) * | 2007-08-31 | 2010-11-02 | Kyocera Mita Corporation | Paper feeder |
US20090057989A1 (en) * | 2007-08-31 | 2009-03-05 | Kyocera Mita Corporation | Paper Feeder |
US20150183596A1 (en) * | 2013-12-27 | 2015-07-02 | Kyocera Document Solutions Inc. | Paper feeding apparatus detecting recording paper presence/absence, paper feed cassette attaching/detaching, and lift plate reaching rising stop position, and image forming apparatus equipped with the same |
US9359156B2 (en) * | 2013-12-27 | 2016-06-07 | Kyocera Document Solutions Inc. | Paper feeding apparatus detecting recording paper presence/absence, paper feed cassette attaching/detaching, and lift plate reaching rising stop position, and image forming apparatus equipped with the same |
US10486928B2 (en) * | 2014-11-19 | 2019-11-26 | Canon Kabushiki Kaisha | Sheet detecting device, sheet feeding unit including the same and image forming apparatus |
US20160167901A1 (en) * | 2014-12-10 | 2016-06-16 | Kyocera Document Solutions Inc. | Sheet feeding cassette and image forming apparatus including the same |
US9637332B2 (en) * | 2014-12-10 | 2017-05-02 | Kyocera Document Solutions Inc. | Sheet feeding cassette and image forming apparatus including the same |
Also Published As
Publication number | Publication date |
---|---|
JP4104399B2 (ja) | 2008-06-18 |
JP2004083234A (ja) | 2004-03-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHARP KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HIRAOKA, JUN;REEL/FRAME:014571/0460 Effective date: 20030731 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |